<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>FlowGL - ECHARTS-GL</title>
        <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
        <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
        <link rel="stylesheet" href="./common.css">
    </head>
    <body>
        <div id="main"></div>
        <script src="../node_modules/echarts/dist/echarts.js"></script>
        <script src="../node_modules/echarts/dist/extension/bmap.js"></script>
        <script src="http://api.map.baidu.com/api?v=2.0&ak=ZUONbpqGBsYGXNIYHicvbAbM"></script>
        <script src="../dist/echarts-gl.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="js/commonUI.js"></script>
        <script>
            var chart = echarts.init(document.getElementById('main'));

            $.getJSON('data/winds.json', function (windData) {
                var data = [];
                var p = 0;
                var maxMag = 0;
                var minMag = Infinity;
                for (var j = 0; j < windData.ny; j++) {
                    for (var i = 0; i <= windData.nx; i++) {
                        // Continuous data.
                        var p = (i % windData.nx) + j * windData.nx;
                        var vx = windData.data[p][0];
                        var vy = windData.data[p][1];
                        var mag = Math.sqrt(vx * vx + vy * vy);
                        // 数据是一个一维数组
                        // [ [经度, 维度，向量经度方向的值，向量维度方向的值] ]
                        data.push([
                            i / windData.nx * 360 - 180,
                            j / windData.ny * 180 - 90,
                            vx,
                            vy,
                            mag
                        ]);
                        maxMag = Math.max(mag, maxMag);
                        minMag = Math.min(mag, minMag);
                    }
                }
                chart.setOption(option = {
                    visualMap: {
                        left: 'right',
                        min: minMag,
                        max: maxMag,
                        dimension: 4,
                        inRange: {
                            // color: ['green', 'yellow', 'red']
                            color: ['#313695', '#4575b4', '#74add1', '#abd9e9', '#e0f3f8', '#ffffbf', '#fee090', '#fdae61', '#f46d43', '#d73027', '#a50026']
                        },
                        realtime: false,
                        calculable: true,
                        textStyle: {
                            color: '#fff'
                        }
                    },
                    bmap: {
                        center: [0, 0],
                        zoom: 1,
                        roam: true,
                        mapStyle: {
                        'styleJson': [
                            {
                            'featureType': 'water',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#031628'
                            }
                            },
                            {
                            'featureType': 'land',
                            'elementType': 'geometry',
                            'stylers': {
                                'color': '#000102'
                            }
                            },
                            {
                            'featureType': 'highway',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                            },
                            {
                            'featureType': 'arterial',
                            'elementType': 'geometry.fill',
                            'stylers': {
                                'color': '#000000'
                            }
                            },
                            {
                            'featureType': 'arterial',
                            'elementType': 'geometry.stroke',
                            'stylers': {
                                'color': '#0b3d51'
                            }
                            },
                            {
                            'featureType': 'local',
                            'elementType': 'geometry',
                            'stylers': {
                                'color': '#000000'
                            }
                            },
                            {
                            'featureType': 'railway',
                            'elementType': 'geometry.fill',
                            'stylers': {
                                'color': '#000000'
                            }
                            },
                            {
                            'featureType': 'railway',
                            'elementType': 'geometry.stroke',
                            'stylers': {
                                'color': '#08304b'
                            }
                            },
                            {
                            'featureType': 'subway',
                            'elementType': 'geometry',
                            'stylers': {
                                'lightness': -70
                            }
                            },
                            {
                            'featureType': 'building',
                            'elementType': 'geometry.fill',
                            'stylers': {
                                'color': '#000000'
                            }
                            },
                            {
                            'featureType': 'all',
                            'elementType': 'labels.text.fill',
                            'stylers': {
                                'color': '#857f7f'
                            }
                            },
                            {
                            'featureType': 'all',
                            'elementType': 'labels.text.stroke',
                            'stylers': {
                                'color': '#000000'
                            }
                            },
                            {
                            'featureType': 'building',
                            'elementType': 'geometry',
                            'stylers': {
                                'color': '#022338'
                            }
                            },
                            {
                            'featureType': 'green',
                            'elementType': 'geometry',
                            'stylers': {
                                'color': '#062032'
                            }
                            },
                            {
                            'featureType': 'boundary',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#465b6c'
                            }
                            },
                            {
                            'featureType': 'manmade',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#022338'
                            }
                            },
                            {
                            'featureType': 'label',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                            }
                        ]
                        }
                    },
                    series: [{
                        type: 'flowGL',
                        coordinateSystem: 'bmap',
                        data: data,
                        supersampling: 4,
                        particleType: 'line',
                        particleDensity: 128,
                        particleSpeed: 1,
                        // gridWidth: windData.nx,
                        // gridHeight: windData.ny,
                        itemStyle: {
                            opacity: 0.7
                        }
                    }]
                });
            });

            // setTimeout(function () {
            //     chart.dispose();
            // }, 5000);
        </script>
    </body>
</html>